PROBLEM SOLVED, my PC needed msvcp120.dll from the Microsoft Visual C++ Redistributable Package for Visual Studio 2013.
I have a 64 bit computer, so I installed both the 64 bit and 32 bit versions as recommended by Microsoft.
I discovered the need for this dll by running the Chameleon compiler via c_pic18.exe command line interface.
Hope this helps someone with a similar problem...

Repeated test with MPLabX v5.15 and default C program generated by MPLabX.
Results are the same as detailed in previous post - compiles fine with BoostC, using Chameleon compiler fails with 'recipe for target xxx failed' error.
Error refers to line 101 of nbproject/Makefile-default.mk file which I have attached to this post.
Has anyone else seen this?
Makefile-default.mk

Hi
Yep.
Its not the first time that an anti-virus triggers a false positive.
Surprisingly it rarely happens as all it takes is a shared sequence of code with a known virus. With the millions of programs out there in the world, it could happen a lot more.
Good you have your problem sorted out.
Best reagrds
Jorge

Hi,
Some delay in responding to your thoughts, and your mention of a virus scan is not far off the mark, but in the wrong direction!
To cut a long story short, it turned out that it was my all-singing-all-dancing virus checker that was the culprit. The penny dropped when I attempted to re-install my version 6.97 toolchain; this was stopped because it declared it contained a trojan!! Ultimately, after a lot of faffing about, it simply required certain compiler files etc. to be excluded from any scanning. The culprit is F-Secure Safe, which I have been using for years; they obviously snook in an update which then caused me to waste 2 days going round in circles. Grrrrrrrrr!
Again, thanks for taking the time and trouble to respond. (I never got anything from Sourceboost support)
Mikew

Hi
That's strange.
Might it be that you are working with a very old project, created under a previous version? How does it behave with a brand new project?
In my installation (7.43), all the compilers have the underscore in the name, also the linker.
BTW, don't forget to do a good virus/malware scan on your PC.
Best regards
Jorge

Hi,
Thanks for the response. The Boost C I have been using for years is Version 6.97 - I have never had the need to upgrade to Version 7.xx. So I can't think that this has anything to do with this sudden "relapse"!!
Since I posted this, I've discovered that the compiler now actually does nothing!! Clicking on 'OK' in the message, it continues without any warnings, declares 'Success' and 'Done' but has not parsed the source file and has not produced a new .hex file.
I'm thinking that a fresh install might cure the problem, but not sure if this is a bad idea without having some idea why it has suddenly happened for no apparent reason.

Hi
I might be wrong, but.
I have a faint memory of such a change somewhere along the V7.xx versions.
At the time the subject was discussed/explained in the forum, maybe you should take a look at it.
What is the exact version you are using?

I have been using Sourceboost C Version 6.97 for some time, without any problems. Today I re-compiled a file and obtained the following odd message:-
Compiler executable was renamed from boostc.pic18.exe to boostc_pic18.exe
If you see this dialog this means that you still try to use the old compiler name.
Nothing has been changed in the installation in any way, and I am at a loss to understand what this error means. After choosing ‘OK’ the compile/link etc. process seemed to continue correctly.
I am at a loss as to why this "error" message has suddenly appeared for no obvious reason. In this case I can't blame Windows 10 updates!!
Perhaps someone more knowledgable of Boost C can shed some light?

Hi Manfred,
You are absolutely correct, the compile button or drop down menu compile does not work.
The source file is saved, the object file seems to get deleted and that's it.
Not a user of the compile button myself, always the F7 (build).
It may get fixed one day in the far future.
Cheers
Reynard

Hi Reynard,
There is one main.c-file and a few included files (with #include<path\filenname>)
I removed all spaces from filenames.
Compiler works if I press the button 'build'😀
Compiler don't work if I press the button 'compile'😡 . Is this a bug in the IDE 7.43?
For me It's no problem. I use now the button 'build' and not longer the button 'compile'
best regards
Manfred

Hi Manfred,
As far as I know spaces in file names have never worked as spaces are command line delimiters. Spaces are allowed in directory names.
I am not sure what you are saying in your first post. You only have one file in your project and you got the response "Done" after the compile.
What were you expecting to see ?
Cheers
Reynard

Hi Manfred and welcome to the SourceBoost forum.
If the project was created using 7.3 before you upgraded to 7.43 then you should clean the project using Build-> Clean All to remove all the previous make files etc.
Other than that there should not be any problems if you are using the F7 key to compile and link.
If you are using Novo libraries (or any of your own libraries) then you should rebuild them with the newest compiler or the linker may complain.
Good luck with your project. Looks like it may be a Nixie tube clock.
Cheers
Reynard

I found out following items:
1. spaces in filenames causes problems in V7.43
2. after removing spaces the button 'build' works (compiles and links project correct)
3. the button 'compile' don't work like post1

Hi,
I am new in this forum and a hobby programmer which uses sourceboost for a few years.
Up to V7.3 sourceboost and compiler works well. Now I does a update to V7.43. Pressing the compiling button of a existing project generates only the attached output message.
Nothing happens.
If I open a cmd window and starts the compiler with a command string then the compiler works perfect.
The options settings in Sourcboost IDE seems to be correct to the path of the compiler. I think that die 'source.c' file are not founded.
What is the cause? Are there any setting for the path of the project in the boost software or in the registry.
please help me.
The problem is on different computers (windows 7 32 bit, Windows 8.1 64 bit)
Manfred

Hello,
I would like a new way to translate the IDE, currently I want to translate the IDE to Spanish, but I don't have the tools, I think there are another options to do it, in order to get a portable -languaje file-, easy to update for new versions.
Thank you in advance.
Regards,
José.

I have been using SourceBoost with Win 10 for several years now without problems. Works the same as it did on XP.
Currently V7.43.
Register the program as administrator or it won't work.
Cheers
Reynard

So, my win7 machine finally gave up the ghost. Interestingly, my win xp system is still working like a champ. Can't connect it to the network, but it still works great.
Anyway, I'll be 'upgrading' to a new laptop with windows 10. Can anyone tell me if sourceboose ide and compilers are compatible with windows 10, or am I going to have issues? If it won't run right, then I guess I'll buy windows 7 and use that as long as possible. I really don't want to have to go with microchip's ide and compilers - they are soooo cumbersome.